# use bash to be safe!
git fetch --all
git branch -r | grep -v '\->' | while read remote; do git branch --track "${remote#origin/}" "$remote"; done
git pull --all
# track all remote branches:
git branch -r | grep -v '\->' | while read remote; do git branch --track "${remote#origin/}" "$remote"; done
# update all local copies of remote branches
git fetch --all
# update all local tracking branches
git pull --all
You can fetch all branches from all remotes like this:
git fetch --all
git clone http://re_here.git branch